﻿//
// (C) Copyright 2009 Irantha Suwandarathna (iranthas@hotmail.com)
// All rights reserved.
//

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use _in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions _in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer _in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using EffiProz.Core.Results;
using EffiProz.Core.Errors;
using EffiProz.Core.Lib;


namespace EffiProz.Core.DataTypes
{
    public class ClobDataID : ClobData
    {
        long id;

        public ClobDataID(long id)
        {
            this.id = id;
        }

        public char[] getChars(SessionInterface session, long position,
                               int length)
        {

            Result resultOut = ResultLob.newLobGetCharsRequest(id, position,
                length);
            Result resultIn = session.execute(resultOut);

            if (resultIn.isError())
            {
                throw resultIn.getException();
            }

            return ((ResultLob)resultIn).getCharArray();
        }

        public long length(SessionInterface session)
        {

            ResultLob resultOut = ResultLob.newLobGetLengthRequest(id);
            Result resultIn = session.execute(resultOut);

            if (resultIn.isError())
            {
                throw resultIn.getException();
            }

            return ((ResultLob)resultIn).getBlockLength();
        }

        public String getSubString(SessionInterface session, long pos,
                                   int length)
        {

            char[] chars = getChars(session, pos, length);

            return new String(chars);
        }

        public ClobData getClob(SessionInterface session, long position,
                                long length)
        {

            ResultLob resultOut = ResultLob.newLobGetRequest(id, position, length);
            Result resultIn = session.execute(resultOut);

            if (resultIn.isError())
            {
                throw resultIn.getException();
            }

            return new ClobDataID(((ResultLob)resultIn).getLobID());
        }

        public void truncate(SessionInterface session, long len) { }

        public Reader getCharacterStream(SessionInterface session)
        {
            return null;
        }

        public long setCharacterStream(SessionInterface session, long pos,
                                       TextReader _in)
        {
            return 0;
        }

        public int setString(SessionInterface session, long pos, String str)
        {

            ResultLob resultOut = ResultLob.newLobSetCharsRequest(id, pos,
                str.ToCharArray());
            Result resultIn = session.execute(resultOut);

            if (resultIn.isError())
            {
                throw resultIn.getException();
            }

            return str.Length;
        }

        public int setString(SessionInterface session, long pos, String str,
                             int offset, int len)
        {

            if (!isInLimits(str.Length, offset, len))
            {
                throw Error.error(ErrorCode.X_22001);
            }

            ResultLob resultOut = ResultLob.newLobSetCharsRequest(id, pos,
                str.Substring(offset, len).ToCharArray());
            Result resultIn = session.execute(resultOut);

            if (resultIn.isError())
            {
                throw resultIn.getException();
            }

            return str.Length;
        }

        public int setChars(SessionInterface session, long pos, char[] chars,
                            int offset, int len)
        {

            if (!isInLimits(chars.Length, offset, len))
            {
                throw Error.error(ErrorCode.X_22001);
            }

            char[] newChars = new char[len];

            Array.Copy(chars, offset, newChars, 0, len);

            ResultLob resultOut = ResultLob.newLobSetCharsRequest(id, pos, chars);
            Result resultIn = session.execute(resultOut);

            if (resultIn.isError())
            {
                throw resultIn.getException();
            }

            return len;
        }

        public long position(SessionInterface session, String searchstr,
                             long start)
        {

            ResultLob resultOut = ResultLob.newLobGetCharPatternPositionRequest(id,
                searchstr.ToCharArray(), start);
            Result resultIn = session.execute(resultOut);

            if (resultIn.isError())
            {
                throw resultIn.getException();
            }

            return ((ResultLob)resultIn).getOffset();
        }

        public long position(SessionInterface session, ClobData searchstr,
                             long start)
        {
            return 0L;
        }

        public long nonSpaceLength(SessionInterface session)
        {
            return 0;
        }

        public Reader getCharacterStream(SessionInterface session, long pos,
                                         long length)
        {
            return null;
        }

        public long getId()
        {
            return id;
        }

        public void setId(long id)
        {
            this.id = id;
        }

        public long getRightTrimSize(SessionInterface session)
        {
            return 0;
        }

        static bool isInLimits(long fullLength, long pos, long len)
        {
            return pos >= 0 && len >= 0 && pos + len <= fullLength;
        }

        public void setSession(SessionInterface session) { }

        public bool isBinary()
        {
            return false;
        }
    }
}
